title: Re: The role of urine drug testing for patients on opioid therapy.
authors.forename: Mark R
authors.initials: MR
authors.lastname: Collen
mesh_terms: D000701:Analgesics, Opioid / Q000652:urine*; D006801:Humans; D009293:Opioid-Related Disorders / Q000652:urine*; D015813:Substance Abuse Detection / Q000379:methods*
chemical_list: D000701:Analgesics, Opioid